Graphic user interface for a display screen



FIG. 1 is a front view of a graphic user interface for a display screen showing an embodiment of our new design; and,

FIG. 2 is a front view of a graphic user interface for a display screen showing another embodiment of our new design.

The broken line showing of the display screen and characters form no part of the claimed design. The broken line showing of the “rain” in FIG. 2 is claimed subject matter. 

The ornamental design for a graphic user interface for a display screen, as shown and described. 